﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace common
{
    class NumberHelp
    {
        public static string random_number()
        {
            Random r = new Random();
            string s = "";
            for (int i = 0; i < 6; i++)
            {
                s += r.Next(0, 10).ToString();
            }
            //Console.WriteLine(s);
            return s;


        }
    }
}
